Fair Value Measurements - Financial Liabilities not Measured at Fair Value (Details) - USD ($) $ in Millions	Oct. 01, 2017	Jan. 01, 2017
Financial Liabilities
Current Debt	$ 8,491	$ 4,684
Non-Current Debt
Non-Current Debt	26,675	$ 22,442
Carrying Amount
Financial Liabilities
Current Debt	8,491
Non-Current Debt
Non-Current Debt	26,675
Estimated Fair Value
Financial Liabilities
Current Debt	8,491
Non-Current Debt
Non-Current Debt	$ 28,675
1.65% Notes due 2018
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.65%
1.65% Notes due 2018 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 601
1.65% Notes due 2018 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 602
4.75% Notes due 2019 (1B Euro 1.1777)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.75%
4.75% Notes due 2019 (1B Euro 1.1777) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,175
4.75% Notes due 2019 (1B Euro 1.1777) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,299
1.875% Notes due 2019
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.875%
1.875% Notes due 2019 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 501
1.875% Notes due 2019 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 506
0.89% Notes due 2019
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	0.89%
0.89% Notes due 2019 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 300
0.89% Notes due 2019 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 301
1.125% Notes due 2019
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.125%
1.125% Notes due 2019 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 699
1.125% Notes due 2019 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 696
3% Zero Coupon Convertible Subordinated Debentures due in 2020
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.00%
3% Zero Coupon Convertible Subordinated Debentures due in 2020 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 68
3% Zero Coupon Convertible Subordinated Debentures due in 2020 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 121
2.95% Debentures due 2020
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.95%
2.95% Debentures due 2020 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 547
2.95% Debentures due 2020 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 567
3.55% Notes due 2021
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.55%
3.55% Notes due 2021 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 448
3.55% Notes due 2021 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 480
2.45% Notes due 2021
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.45%
2.45% Notes due 2021 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 349
2.45% Notes due 2021 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 358
1.65% Notes due 2021
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.65%
1.65% Notes due 2021 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 998
1.65% Notes due 2021 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 991
0.250% Notes due 2022 (1B Euro 1.1777)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	0.25%
0.250% Notes due 2022 (1B Euro 1.1777) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,174
0.250% Notes due 2022 (1B Euro 1.1777) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,183
2.25% Notes due 2022
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.25%
2.25% Notes due 2022 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 995
2.25% Notes due 2022 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,005
6.73% Debentures due 2023
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	6.73%
6.73% Debentures due 2023 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 250
6.73% Debentures due 2023 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 310
3.375% Notes due 2023
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.375%
3.375% Notes due 2023 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 806
3.375% Notes due 2023 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 853
2.05% Notes due 2023
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.05%
2.05% Notes due 2023 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 497
2.05% Notes due 2023 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 494
0.650% Notes due 2024 (750MM Euro 1.1777)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	0.65%
0.650% Notes due 2024 (750MM Euro 1.1777) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 879
0.650% Notes due 2024 (750MM Euro 1.1777) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 887
5.50% Notes due 2024 (500 MM GBP 1.3415)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	5.50%
5.50% Notes due 2024 (500 MM GBP 1.3415) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 665
5.50% Notes due 2024 (500 MM GBP 1.3415) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 842
2.45% Notes due 2026
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.45%
2.45% Notes due 2026 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,990
2.45% Notes due 2026 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,958
2.95% Notes due 2027
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	2.95%
2.95% Notes due 2027 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 995
2.95% Notes due 2027 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,010
1.150% Notes due 2028 (750MM Euro 1.1777)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.15%
1.150% Notes due 2028 (750MM Euro 1.1777) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 874
1.150% Notes due 2028 (750MM Euro 1.1777) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 888
6.95% Notes due 2029
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	6.95%
6.95% Notes due 2029 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 296
6.95% Notes due 2029 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 409
4.95% Debentures due 2033
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.95%
4.95% Debentures due 2033 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 498
4.95% Debentures due 2033 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 601
4.375% Notes due 2033
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.375%
4.375% Notes due 2033 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 856
4.375% Notes due 2033 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 976
1.650% Notes due 2035 (1.5B Euro 1.1777)
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	1.65%
1.650% Notes due 2035 (1.5B Euro 1.1777) | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,748
1.650% Notes due 2035 (1.5B Euro 1.1777) | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,798
3.55% Notes due 2036
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.55%
3.55% Notes due 2036 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 987
3.55% Notes due 2036 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,024
5.95% Notes due 2037
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	5.95%
5.95% Notes due 2037 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 991
5.95% Notes due 2037 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,348
3.625% Notes due 2037
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.625%
3.625% Notes due 2037 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,485
3.625% Notes due 2037 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 1,558
5.85% Debentures due 2038
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	5.85%
5.85% Debentures due 2038 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 696
5.85% Debentures due 2038 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 934
4.50% Debentures due 2040
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.50%
4.50% Debentures due 2040 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 537
4.50% Debentures due 2040 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 634
4.85% Notes due 2041
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.85%
4.85% Notes due 2041 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 296
4.85% Notes due 2041 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 357
4.50% Notes due 2043
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	4.50%
4.50% Notes due 2043 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 495
4.50% Notes due 2043 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 570
3.70% Notes due 2046
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.70%
3.70% Notes due 2046 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 1,971
3.70% Notes due 2046 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 2,058
3.75% Notes due 2047
Non-Current Debt
Debt Instrument, Interest Rate, Stated Percentage	3.75%
3.75% Notes due 2047 | Carrying Amount
Non-Current Debt
Non-Current Debt	$ 990
3.75% Notes due 2047 | Estimated Fair Value
Non-Current Debt
Non-Current Debt	1,038
Other | Carrying Amount
Non-Current Debt
Non-Current Debt	18
Other | Estimated Fair Value
Non-Current Debt
Non-Current Debt	$ 19